Built for skiers, hunters, ice anglers, and winter commuters who refuse to spend the day fighting cold toes, these Medium heated socks pair dual 5000 mAh lithium batteries for a combined 10,000 mAh of capacity, delivering up to 7 hours of steady warmth on the lowest setting. Heat wires wrap around toes, soles, and the tops of the feet for true 360 degree coverage instead of one-spot hot zones, and four temperature levels span 40 to 70 C so you can match the output to fast-moving hikes or stationary winter sports. A smartphone APP lets you change settings without pulling off gloves, while a physical button on the battery gives backup access when reception is patchy. The skin-friendly modal core yarn and faux mink fleece lining keep the inside soft against bare skin during long sessions, and the socks are machine or hand washable with the included laundry bag for easy cleanup. Sized Medium to fit US 6 to 9 (EU 38 to 42), each pair weighs just 1.01 lb. and stores easily inside a winter boot bag or daypack. Color: Black/ gray/ and orange. Gender: Unisex.